What is Fixed pressure water-spraying and water-mist fire-extinguishing systems?

Fixed pressure water-spraying fire-extinguishing systems

2.1.1 Nozzles and pumps

Any required fixed pressure water-spraying fire-extinguishing system in machinery spaces shall be provided with spraying nozzles of an approved type. The number and arrangement of the nozzles shall be to the satisfaction of the Administration and shall be such as to ensure an effective average distribution of water of at least  5 L/m2/min in the spaces to be protected. Where increased application rates are considered necessary, these shall be to the satisfaction of the Administration. Precautions shall be taken to prevent the nozzles from becoming clogged by impurities in the water or corrosion of piping, nozzles, valves and pump. The pump shall be capable of simultaneously supplying at the necessary pressure all sections of the system in any one compartment to be protected. The pump may be driven by independent internal combustion machinery, but, if it is dependent upon power being supplied from the emergency generator fitted in compliance with the provisions of regulation.

Leave a Comment